Spraying device



March 20, L1951 E. o. NoRRls SPRAYING DEVICE 4 Sheets-Sheet l Filed Jan. 24, 1946 INI/ENTOR.

EDWARD O. NORFP/S ATTORNEY E. O. NORRIS SPRAYING DEVICE 4 Sheets-Sheet 2 March 20, 1951 Filed Jan. 24, 1946 INVENTOR.

i EDWARD O. NORQIS TTORNE Y March 20, 1951 E. o. NoRRls SPRAYING DEVICE 4 Sheets-Sheet 5 Filed Jan. 24, 1946 INI/ENTOR.

EDWARD O. MORRIS ATTORNEY E. O. NORRIS SPRAYING DEVICE March 20, 1951 4 sheets-sheet 4 Filed Jan. 24, 1946 Nl/ENl'oR. EDWARD O. NOQQ/S ATTORNEY Patentecl Mar. 20, 1951 UNITED STATES,l PATENT OFFICE 2,545,487 sPRAYrNG DEVICE Edward 0. Norris, Westport, Conn..

Application January 24, 1946, Serial No.r 643,063

(Cl. a99-:63.)

9 Claims.. l

This invention relates generally to spraying apparatus of the centrifugal type wherein a liqf, uid is fed by suitable means to an atomizing dise tributor, rotating at high speed, which receives, atomizes, and projects the liquid in anely die. vided spray, through a suitable opening in the apparatus, against the surface to be sprayed.

More speciiically, the invention relates to a portable centrifugal Spraying apparatus of the so-called all-position type which is capable of being operated at any angle.

The apparatus disclosed in this application is a modification of the apparatus shown and de.. scribed in my coepending application Serial No. 641,929, iiled January 18, 1946. This application is directed to the specic construction of the at-omizing distributor and to the mechanism for controlling the admission of liquid thereto, the general object oi the invention being to provide a device of thischar-acter which is simple, compact, light and efcien-t in operation and which is especially adapted for use by relatively unskilled operators.

Another object of the invention is to provide in a device of this character improved means for supporting and rotating the atomizing distributor in combination with means for controlling the admission of liquid thereto.

Other and more limited objects of the invention will be apparent from the following speciiication and the accompanying drawings forming a part thereof wherein:

Fig. 1 is a central longitudinal vertical section through a centrifugal spraying device cons'tructed according to my invention with parts in elevation;

Fig. 2 is a horizontal section taken on the line 2--2 of Fig. l;

Fig. 3 is a transverse section taken on the line 3-3 of Fig. .1;

Fig. 4 is a transverse section taken on the line 4-'4 of Fig. 1;-

Fig. 5 is an enlarged central vertical section through the atomizing distributor with par-ts in elevation;

Fig. 6 is a section taken on the line 5 6 of Fig. 5; and K Fig. 7 is a view similar to Fig. 5 showing a modied form of distributor with parts in elevation. A'

My improved spraying apparatus comprises generally a rotating open ended collecting case, into which liquid is forced under pressureQand a rotating atomizing distributor within the case which picks up, atomizes and sprays the liquid through the open end of the case. YThe collecting case and distributor are suitably supported by a housing within which is mounted a high speed motor and suitable gearing by which the collecting case and distributor are rotated. A

handle by which the device is held when used is secured to the housing. Fingeroperated means are also provided for controlling the admission of liquid to the apparatus, and for moving the distributor between operative and inoperative positions. l

,Referring to the drawings by reference characters, the numeral I indicates a motor housing in which a small high speed series type motor, having an armature shaft 2, is suitably mounted. The rearend of the housing- I is closed by a removable cover 3, which when removed affords access to the motor.

A handle 4, by which the device is held when in operation, is rigidly secured to the under side of the housing I.

A gear casing 5 is secured to the forward end of the motor housing I by bolts 6 (Fig. 4). Secured to and projecting forwardly from the face of the gear casing 5 is a tubular bearing stud 'l which is disposed in axial alignment with the armature shaft 2. A sleeve 8 having a spur gear 9 secured to the rear end thereof and a radially extending concentric circular ring I0 secured to the forward end thereof is rotatably mounted on the stud 'land is retained thereon by a nut II` on the forward end of the stud 'I.

The gear 9 meshes with a small pinion I2 formed on the projecting end of a shaft I3 which is rotatably supported by the gear casing 5 and the front wall Id of the motor housing I. Secured to the shaft I3 within the gear casing 5 is a spur gear I 5. The gear I5 meshes with a smaller gear I6 rotatably mounted upon a short shaft I'I (Fig. 4) which is also Supported by the gear casing 5 and front Wall I4 of the motor casing. `The gear I 5 in turn meshes with a small pinion I8 Secured to the projecting end of the armature shaft 2. The sleeve 8 is rotated by the motor through this gear train at a greatly reduced speed, the reduction being preferably in the proportion of 25 or 30 to 1. A split shield IS, which is removably secured to the face of the gear casing `5, encloses the gear 9, pinion I2 and the sleeve 8.

A collecting case 20 is removably secured to the ring I E! in any suitable manner. As shown here'- in the rear end of the collecting case 2,0 is permanently secured t0 an interiorly threadedring 2l which is screwed on to an exteriorly threaded forwardly extending annular flange 22 integral with the ring l). The collecting case 2U, which is circular in cross section, flares outwardly as indicated at 23, gradually increasing in diameter as it extends forwardly from the ring 2| until it merges with a toric shaped trough 24. The portion 25, of the collecting case 29, forwardly of the trough 24 gradually decreases in diameter and terminates at the circular opening 26 in the forward end of the case.

A frusto conical ring 21 is concentrically mounted within the section 25 of the collecting case 26, with its small end projecting through the opening 26 slightly beyond the forward end of the case. A cut-off flange comprising a conical ring 28 similar to, but smaller than, the ring 21 is concentrically mounted within the ring 2:' so as to provide an annular space 29 between the inner wall of the ring 21 and the outer wall of the ring 28. As shown in Fig. l, the plane of the forward edge 3B of the ring 28 is slightly to the rear of the plane of the forward edge 3l of the ring 21. Both the rings 21 and 28 are supported and held in place by a plurality of lugs 32 which are secured to and project inwardly from the inner wall of the lportion 25 of the collecting case. A frusto conical splash guard or ring 33 is secured to the inner surface of the cut-off ange 28, with the edge of its large end in contact with the inner surface of the ring 23 and its small end projecting rearwardly within the case 28. rIhe forward edge of the splash guard 33 has a plurality of spaced notches 34 formed therein so as to provide a plurality of uninterrupted paths along the inner surface of the ring 28 between the forward and rearward edges thereof. A ring-shaped open mesh screen 35 is also supported by the lugs 32 between the inner wall of the case 26 and the splash guard 33.

The atomizing distributor generally indicated by the numeral 36 is rotatably supported within the collecting case 26 by a hollow supporting tube 31. The axis of the distributor lies in a plane parallel Vto a vertical plane through the axis of the collecting case 20, and is substantially perpendicular to a horizontal plane through the axis of the collecting case, as viewed in Fig. 2. The intake end of the distributor 36, when not spraying, is in close proximity to the annular trough 24 as shown in full lines in Figs. 1 and 3. When spraying the distributor is in the position shown in dotted lines in Figs. l and 3.

Suitable mechanism which is provided for supporting and rotating the distributor 36 and for moving it back and forth between operative and inoperative positions will now be described in connection with the construction and operation of the distributor.

The rear end of the supporting tube 31 is rigidly secured to a stationary cross member 38 within the bearing stud 1. The tube 31 extends forwardly from the cross member 38 into the collecting case 20 for a short distance in axial alignment with the armature shaft 2, and then curves upwardly of and to one side of the axis and then downwardly as shown in Figs. l and 2. The forward downwardly turned end of the tube 31 has rigidly secured thereto a tubular number 39 (Fig. upon which the atomizing distributor 36 is rotatably mounted. The member 39 comprises two cylindrical sections 4l] and 4I, the lower section 4D being of lesser diameter than the upper section 4i, and it has a longitudinally extending bore 42 in alignment with the end of the bore in the tube 31.

The distributor 35 includes an elongated frustoconical sleeve 43 and a cup-shaped member 44. The angle between the wall of the sleeve 43 and the axis thereof is preferably between 12 and 15; and the larger end thereof is toothed as indicated at 45. axially disposed cylindrical hub 46, by spiders 41, which is rotatably mounted upon the reduced section 49 of the member 39. The hub 46 has a closed end 48 with an axially disposed squared aperture therethrough. A short shaft 49, which Vis rotatably supported within the bore 42 in the member 39, has a reduced squared end 59 which extends into the aperture in the end 48 of the hub 46. A screw 5| and washer 52 hold the hub 46 and shaft 49 together in driving engagement.

The cup-shaped member 44 has a re-entrant end 53 which is rigidly secured to a hub 54 dis- :posed axially thereof. The hub 54 is rotatably mounted upon the upper larger section 4| of the member 39, and is held in position thereon by an annular flange 55 and a split ring 56 which is snapped into a groove 51 after the hub 54 has been positioned upon the member 39. A pair of axially extending slotted arms 58 secured to the hub 54 slidablyengage the upper spider 41 which is rigidly secured to the hub 46. A lplurality of spaced slightly dished atomizing and spraying rings 59 are secured about the cup-shaped member 44 between an annular ange 60 and a nut 6I The rings 59 are assembled and held in their proper spaced relation to each other by rivets 6-2 and spacers 63. There are a plurality of spaced slots 44a extending through the wall of the member 44, adjacent the inner edges of the rings 59.

A short shaft 64 (Fig. 2) is slidably and rotatably mounted in the rear end of the tube 31. This shaft 64 projects rearwardly out of the tube 31, and has a squared end 65 (Fig. 1) slidably engaging in a complementary squared socket ES in the end of the armature shaft 2. T'he shafts 49 and 54 are connected together by a exible shaft 64a extending between them within the tube 31. This provides a driving connectionbetween the motor and the distributor. The armature shaft 2 drives shaft 64 which through the flexible shaft 64a drives the shaft 49. The shaft 4e through the connections 59 to 52 in turn rotates the hub 46 and the conical sleeve 43 car-v ried thereby. The cup-shaped member 44 is rotated in unison with the sleeve 43 through the arms 58 which are secured to the hub 54 and slidably engage the spider 41.

The construction of the distributor 36 is such that in operation it will throw out a band of finely atomized liquid which will completely surround the rings '59. The liquid leaves the rings 59 tangentially thereof, and the thickness of the band is substantially equal to the distance between the uppermost and lowermost rings 59 as indicated in Fig. l. Part of the band of spray will be projected out through the cut-off flange 29 in a vsegment which gradually increases in width after leaving the cut-off flange, as indicated in Fig. 2. The balance of the band of spray is intercepted by the inner wall of the case 29 by which it is collected and returned to the distributor for re-spraying. To secure the most efficient results the band of spray leaving the cutoff Jiange 28 should be substantially symmetrical about the extended axis of the collecting case 29. The periphery of the rings 59 should be tangent to a plane through the axis of the case 20 and the length of the sleeve 43 should be such that the small intake end thereof will dip into the The sleeve 43 is secured to an elongated` anche?.

trough during operation, and the rings 59 will be in a position to project a band of spray'out through the cut-oifflange 28 as described. l

The tube 31 has a flanged collar 6T (Fig. 5) rigidly secured thereto within the oase 29. A ring 68 having a peripheral groove 69 is rotatably mounted upon the collar 61. The ring l0, to which the case 20 is secured, has a forwardly projecting annular ange l (Figs. 1 and 2) having a peripheral groove 1| formed integrally therewith. One end of a flexible boot 12 is secured to the ring 68 by a spring clamp 'I3 which cooperates with the groove 69, and the other end thereof is secured to the flange 'l0 by a spring clamp 14 which cooperates with the groove ll. The boot 'l2 functions as a seal between the case 20 and the interior of the bearing stud l to prevent any liquid from being thrown, or draining, back through the hollow stud 1 into the gear case or motor.

`The shaft 64 has a collar 'l5 (Fig. 2) secured thereto between the rear end of the tube 31 and the forward end of the armature shaft 4l. A thrust bearing i6 about the shaft 64 bears against the forward face of the collar 'l5 and a similar bearing 'l1 engages the rear face of the collar 75. A compression spring 18 surrounding the shaft 64 between the thrust bearing 16 and the rear end of the tube 3'! normally biases the shafts 49 and 64 and the conical distributor sleeve 43 to the inoperative positions as shown ,in Figs; 1 and 5.

A lever 'i9 is pivoted intermediate its ends to an ear formed on and within the gear casing as indicated at 80. One end of the lever 19 is bifurcated as indicated at 8| and straddles the shaft 64 adjacent the bearing 11. The other end of the lever 19 is bifurcated as indicated at 82 and straddles a reciprocally mounted rod 83 between a collar 84 thereon and a compression spring 85 therearound. The rod 83 projects out through the front wall of the gear casing 5 into engagement with a trigger 86 pivoted at 81 to a lug on the gear case. The trigger 86 which is somewhat ilexible, below the point of engagement with the rod 83, extends downwardly into alignment with and a short distance beyond the upper forwardly extending curved end 88 of a lever 89 which is operable to control the opening and closing of a valve 90.

. The valve 90 controls the admission of liquid to the collecting case 20. The liquid is forced,

larged end or crown'of the sleeve |0| by a nut U.

The rings |99 are assembled and held in proper spaced relation to eachother by rivets and spacers H2. The depth of the teeth |02 is substantially equal to the distance between the uppermost and lowermost rings |09. A short shaft ||3 having a flattened surface ||4 thereon is usually by air pressure, from a suitable container l through a flexible hose 9| to the valve 90. After passing the valve 90 the liquid flows through an upwardly and an outwardly extending conduit 92 in the handle 4, and thence through a tube 93, the end 94 of which is turned back upon itself and extends into the collecting case 29 through the open forward end 26 adjacent the outer surface of the ring 2l.

The lever 89, which is positioned in a slot 95 in the handle 4 (Figs. 3 and 4) in such a manner that the operators hand will not engage it when he grips the handle 4, is pivoted at its lower end to a lug 95 (Fig. 1) on the casing of the valve slidably and rotatably mounted within the hollow shaft |09. The shaft ||3 extends out through an opening in the end |05 of the hub |04 and has a valve disc ||5 secured to the end thereof. The distributor is rotated by and in unison with the shaft ||3 by reason of the flattened surface lil thereon engaging a complementary flattened f surface in the end |05 of the hub. The valve disc I5 is normally biased to the position shown in full lines, by a spring H6, which effectively closes the entrance end of the conical sleeve |0I.

The shaft |13 is connected to and rotated by the shaft 64 through the medium of a flexible shaft lll. Suitable trigger operated mechanism similar to that shown in Fig. 1 is provided for moving the valve, disc ||5 between full line and dotted line positions, or between inoperative and operative positions.

In operation the operator grasps and holds the device by the handle 4 with his forefinger around the trigger 86. The motor is energized, by means of a suitable switch not shown, which through the gear train rotates the collecting case 20 at a speed of 400 to 600 revolutions per minute, and directly from the armature shaft 2 through the ilexible shaftV 64a rotates the distributor at a speed of about 12,000 revolutions per minute. The direction of rotation of the collector casing 20 and the distributor 36 is indicated by arrows in Fig. l3. The trigger 85 is then squeezed and moved toward the curved end 88 of the lever 89. This will move the distributor 36 from the inoperative position, shown in full lines in Figs. 1 and 3, to the operative position, shown in dotted lines in Figs. l and 3. In

Y `the operative position the intake end of the sleeve 43 of the distributor projects into the trough 24 as is clearly shown by the dotted lines in Fig. 3. The open end of the sleeve 43 faces the advancing liquid in the case 20 and the edge of the sleeve dips into the liquid film to scoop up'tlie liquid into Athe sleeve. Further pressure on the flexible end of the trigger 86 will bring it into engagement with the forwardly extending curved end 88 of the lever 89 and rock the lever 89 on its pivot which will open the valve 90.

.This will permit liquid `to be forced under pressure from the storage receptacle through the flexible conduit 9|, passageway 92 and tube 93 into the collecting case 20. Due to the particular shape of the case 20 and to the centrifugal action caused by the rotation of the case the liquid will flow into the trough 24 lling it up to the dot and dash lines marked A in Fig. 1.

y The liquid will be carried around in the trough as it rotates and will be forced by its inertia into the intake end lof the sleeve'43 of the distribun tor and scoop up thereby. The rotation and shape of the distributor sleeve will cause the liquid to now up the inner surface of the sleeve 43 to the teeth 45 at the upper end thereof where it will be thrown outwardly between the teeth i5, by centrifugal force, onto the rings 59. The rings 59 due to their high speed of rotation will throw or spray the liquid outwardly tangentially thereof in a finely divided atomized spray as previously described. As previously stated, part of this spray will be projected out through the cutoif flange 28 mounted in the open end 26 of the case 20. The balance of the spray will be caught by the inner wall of the cup and will be collected and returned to the trough 24 for re-spraying. Part of the spray will strike the inner rearwardly flaring wall of the cut-off flange 28. Any liquid reaching the forward edge 30 of the cut-off flange will be thrown radially outwardly therefrom against the inner Wall of the ring 2T which due to its shape and rotation will feed it back into the case 25. The balance of the liquid striking the wall of the cut-off iiange will be returned thereby through the notches 34 in the splash guard 33 and into the case 20.

When the distributor shown in Fig. 'l is used in place of the distributor shown in Figs. l to 6, it is mounted within the collecting case 20 in such a position that the intake end of the conical feed cone or sleeve IBI will always lie within the trough 24, and the operation thereof is controlled by the valve disc H5, which in the position shown in full lines effectively prevents the admission of liquid thereto. To render the distributor operative to spray liquid the valve disc H5 is moved from the full line position to the dotted line position by suitable trigger operated mechanism in the same manner as described in connection with operation of the device as shown in Figs. l to 6.

It is to be understood that .the apparatus is suited for paint spraying and also for atomizing and spraying other liquid, such as a liquid disinfectant, for instance.

From the foregoing it will be apparent to those skilled in this art that I have provided a simple and efficient mechanism for carrying out the objects of my invention. It is to be understood tha my invention is not limited to the specific construction shown and described herein as various modifications can be made therein within the scope of the appended claims.

What is claimed is:

l. In a spraying apparatus 'the combination of a rotary collecting case, an axially disposed spray discharge opening in one end of said case, means for rotating said case to form a peripheral film of spray-forming material about the inner wall thereof, means for feeding said material into said case, a rotary distributor disposed entirely within said case and rotating in a plane intersecting said spray opening, pick-up means rotating with said distributor and having means to pick up said material from said lm, said pickup means having an intake port through which said material is admitted to said distributor from said film, means for rotating said distributor, a valve in said port, and means for opening and closing said valve to control the admission of said material to said distributor 2. A spraying device comprising a rotary case having an axial spray opening and a peripheral wall shaped to carry a film of spray-forming material by centrifugal action, driving means for rotating said case, arotary distributor mounted within said case and positioned to discharge a spray through said spray opening, said distributor comprising a tubular support rigidly secured within said casing, a shaft rotatably mounted within said support, a frusto-conical sleeve rotatably mounted upon said tubular support, serrations about the large end of said sleeve, an annular member rotatably mounted on said tubular support having an annular peripheral wall encircling the serrated end of said frusto-conical sleeve, spaced axially extending slots in the peripheral wall of said annular member, a plurality of spaced rings rigidly secured about said peripheral wall, means for rotating said shaft, driving connections between said shaft and said frusto-conical sleeve, driving connections between said frusto-conical sleeve and said annular member, and means for controlling the admission of said material to said distributor.

3. A spraying device comprising a rotary case having an axial spray opening and a peripheral wall shaped to carry a lm of spray-forming material by centrifugal action, driving means for rotating said case, a rotary distributor mounted within said case and positioned to discharge a spray through said spray opening, said distributorf comprising a tubular support rigidly secured within said casing and a frusto-conical feed sleeve rotatably mounted on said support, serrations about the large end of said sleeve, an annular member rotatably mounted u-pon said support having an annular peripheral wall encircling the serrated end of said sleeve, a plurality of spaced axially extending slots through said peripheral wall, a plurality of spaced rings rigidly secured about said peripheral Wall, means for rotating said sleeve and said annular member in unison, and control means for moving said sleeve axially of said tubular support into or out of the nlm of said material in said case to control the admission of said material to said distributor.

4. A spraying device comprising a rotary case having an axial spray opening and a peripheral wall shaped to carry a film of spray-forming material by centrifugal action, driving means for rotating said case, a rotary distributor mounted Within said case and positioned to discharge a spray through said spray opening, said distributor comprising spraying means including a cupshaped member having a slotted annular Wall, an open end and a closed end rotatably supported within said case with the annular wall rotating in a plane intersecting said opening, frusto-conical feeding means for spray-forming material having the large end thereof serrated to provide a plurality of similar inclined edges rotatably mounted with the serrated end thereof positioned within said annular Wall and with the highest point of each of said inclined edges adjacent the closed end of said member and the lowest point of each of said inclined edges adjacent the open end of said member, and drive means connected to simultaneously rotate said spraying means and said feeding means.

5. In a spraying apparatus the combination of a rotary case having an annular channel adapted to carry an annular iilm of spray-forming material due to centrifugal force, a spray discharge opening in said case, a rotary distributor in said case comprising a ring rotating in a fixed plane intersecting said opening to discharge a spray of said material therethrough, a frusto-conical sleeve having its small end dipping into said film of material in said channel and having means to feed said material to said ring, andv a valve arranged to control the feed of said material through said distributor.

6. In a spraying apparatus, the combination of a rotary case having a channel carrying an annular iilm of spray-forming material, an axially disposed spray discharge opening in one end of said case, a tubular support immovably disposed within said case, a frusto-conical feed sleeve rotatably mounted upon said support with one end thereof projecting into said film of material in said channel, a plurality of superimposed spaced rings mounted about the other end of said feed sleeve operative to receive the material from said feed sleeve and spray said material out through said opening, a valve normally closing the one end of said sleeve projecting into said lm of material, and means for operating said valve to control the admission of said material to said sleeve.

7. A spraying device comprising a rotary case having an axial spray opening and a peripheral wall having an annular channel to retain sprayforming material, driving means for rotating said case to form an annular film of said material in said channel, a rotary distributor disposed Within said case comprisingr a fixed tubular support, a frusta-corneal feed sleeve journalled on said support, said sleeve having an open small end positioned to project into said lm of material in said channel and facing toward the peripherally advancing material to scoop up a supply of said material from said film, a drive shaft connected to rotate said sleeve to feed the scooped up material centrifugally along itsfiiar ing inner surface and to discharge the same centrifugally from a discharge portion at its large end, means controlling the feed of material along said sleeve, a distributor ring mounted to rotate on said fixed support in said rotary case and constrained against axial movement, said ring extending around said sleeve at said discharge portion to receive the material therefrom, and means connecting said drive shaft to rotate said ring to discharge the material therefrom centrifugally in a band of spray, said ring lying in a plane intersecting said opening whereby `a segment of said spray band passes through said opening and the remainder thereof is intercepted by said case and returned to said channel.

8. A spraying device comprising a rotary case having an axial spray opening and a peripheral Wall having a channel to retain spray-forming material, driving means for rotating said case to form an annular film of said material in said channel, a rotary distributor disposed within said case comprising a fixed tubular support, a frustoconical feed sleeve journalled on said support and shiftable axially thereof, said sleeve having an open small end to project into said film of material in said channel or to be retracted from said film, said open end facing toward the peripherally advancing material to scoop up a supply of said material from said film, a drive shaft connected to rotate said sleeve to feed the scooped up material centrifugally along its flaring inner surface and to discharge the same centrifugally from a discharge portion at its large end, a lever connected to advance or retract said sleeve, a distributor ring mounted to rotate on said fixed support and constrained against axial movement, said ring extending around said sleeve at said discharge portion to receive the material therefrom, and means connecting said drive shaft to rotate said ring to discharge the material therefrom centrifugally in a band of spray, said ring lying in a plane intersecting said opening whereby a segment of said spray band passes through said opening and the remainder thereof is intercepted by said case and returned to said channel.

' 9. A spraying device comprising a rotary case having an axial spray opening and a concave peripheral wall forming a channel to retain a spray-forming material, driving means for rotating said case to form an annular nlm of said material in said channel, a rotary distributor disposed Within said case comprising a fixed tubular support, a frusto-conical feed sleeve journalled on said support and shiftable axially thereof, said sleeve having an open small end to project into said lm of material in said channel or to be retracted from said film, said open end fac ing toward the peripherally advancing material to scoop up a supply of said material from said lm, a drive shaft connected to rotate said sleeve to feed the scooped up material centrifugally along its flaring inner surface and to discharge the same centrifugally from a discharge portion I at its large end, means shifting said drive shaft axially for advancing or retracting said sleeve, a distributor ring mounted to rotate on said fixed support, and constrained against axial movement, said ring extending around said sleeve at said discharge portion 'to receive the material therefrom, and means connecting said drive shaft to rotate said ring to discharge the material therefrom centrifugally in a band of spray, said ring lying in a plane intersecting said opening whereby a segment of said spray band passes through said opening and the remainder thereof is intercepted by said case and returned to said channel.

' EDWARD O. NORRIS.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,063,048 Norris Dec. 8, 1936 

